Snowplow



P 1929' J. M. BISING 1,728,032

SNOWPLOW Filed April 25, 1926 5 Sheets-Sheet l I Wyn/r00 lr/lwiss: d

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BISING Sept 1929.

SNOWPLOW Filed April 25, 1926 3 Sheets-Sheet 3 W/TIVES Patented Sept. 10, 1929.

UNITED STATES PATENT, OFFICE.

JAMES M. BISING, OF JERSEY CITY, NEW JERSEY, ASSIGNOR TO AMERICAN ROAD MACHINERY COMPANY, INC., OF KENNETT SQUARE, PENNSYLVANIA, A CORPORA- TION OF DELAWARE.

Application filed April 23, 1926. Serial No. 104,013.

My invention relates to snow plows and more particularly to that type of snow plow which is adapted for attachment to motor trucks, tractors or other convenient sources of power.

Plows of the character to which my invention pertains are of great value in openingand maintaining open highways and in connection with the removal -of snow from city streets, their value being particularly derived from the fact that they may be readily attached to, and detached from, an otherwise useful' source of power and, perhaps equally, from the fact that they may be operated at relatively high speed.

Such .plows are usually of the blade type and are so constructed as to readily pass over obstructions without injury to the blade, thus enabling them to be operatedrapidly and Without particular attention to the existence of obstructions, such for example, as manhole covers and the like. The capacity for passing over obstructions possessed by plows of the character referred to, is dependent upon the mounting of the blade on a longitudinal axis and the provision of tension means tending to hold the blade in a working position, governed by a stop. When an obstruction is met, the blade may tilt forwardly on itsaxis, against the action of the tension means with the result that its working edge is. moved backwardly and upwardly and is enabled to pass over the obstruction. The blade is then returned to working osition by the tension means. v

Plows of the character to which my invention pertains, while usually of the blade type, are not infrequently of the V type, but such plows when of the V type have no capacity to yield for passing over obstructions, it being usual to depend on runners for guiding the plow bodily over any obstructions met with.

The plows of both the blade and V type are open to various objections chief among which 45 are that the blade plows. having the capacity to yield and avoid damage to themselves on meeting with obstructions, are ineflicieut due to the tilting of the blade which throws the entire blade out of operation or working position and snow is permitted to pass over and Iii) snowrnow.

under it. The V type plows, having no capacity to yield on meeting an obstruction, are subject to serious damage, unless operated slowly and with the greatest care, or so adjusted as to be clear of any possible obstruction. Either method of "avoiding obstructions results in inefiiciency.

Now it is the object of my invention to provide a snow plow which will retain all the advantages of the present plows of the character indicated and at the same time, will be so constructed as to adapt itself to obstructions without injury therefrom and to have increased enfliciency due to superior plowing action.

More particularly my invention contemplates the provision of a plow having two parts, one an adjustable workin blade mounted rigidly above the road surface and the other a yieldingly mounted cutting edge positioned to the rear of and below the working blade.

My invention, while primarily adaptable to snow plows of the blade type, is fully adaptable to V type plows.

Having now indicated, in a general way, thenature and purpose of my invention, I will proceed to a detailed description thereof with reference to the accompanyin drawings in which there is illustrated a pre erred embodimentand in which Fig. 1, is a side view of a snow plow embodying my invention, illustrated as attached to a motor truck or tractor, indicated diagrammatically.

Fig. 2, is a plan view of the plow illustrated in Fig. 1.

Fig. 3, is a front view of the subject of Fig. 1.

In the several figures 0 indicates a motor truck or tractor, having a front axle b to which are clamned brackets a to which are pivotally connected the rear ends of the side members of a frame 11.

Upon the frame d is mounted a semicircle e, suitably braced by members f and pivot-ally secured to the forward end of the frame by a pivot pin g. The semicircle is rotatable relative to the frame about the pin 9 and is adapted to be positioned relative to the frame by means of a pin it which is passed through cure the semicircle to the frame d through the medium of bracket A pair of rollers, or other supporting device, la is positioned beneath opposite sides of the semicircle and is connected thereto through springs contained in casings 1 secured to the semicircle.

A blade m, of desired length and height is pivotally connected to the semicircle by means of pins n, which extend longitudinally of the blade and support the blade withits lower edge m substantially spaced from the ground. The blade is retained in working position by means of blade stops, 0 and p, pivotally connected to the casings Z and to the blade by a pin t, and are also connected to each other through the medium of turnbuckles or other adjustable device g; Thus it will be noted that the position of the blade about the pins n is fixed, but may be adjusted to various angular positions by manipula; tion of the turnbuckles q. f p

A second blade r of the same, or substantially the same, length and of a hei ht in excess of the distance that the lower e ge m of the blade m is spaced from the ground, and having wing like extensions 1" at its ends, is secured to arms 8, which re in turn pivotally secured to the blade m, r to any convenient support as the semicircle e,-by means of pins t, which pass through angle members u, which serve to stiflen blade m, and through arms or levers s. The arms 8 are of such shape and length as to enable the positioning of blade 1- a distance behind blade m and with its lower edge on or adjacent to the ground, so that the blade 1 will act in a space equal to the space between the lower edge m of blade m and the ground and not occupied b the blade m.

The blade 7 is yieldingly retained in position by means of springs 21, one associated with each of the arms or levers s.

The springs 'v are carried on reduced portions of rods w each pivotally secured at one end to the blade m by a in n. The reduced portions of rods'w pass t rough holes in arms 8 and bosses in on'arms s and the springs are confined thereon, at a set tension, between the bosses w and washers retained by nuts y threaded on the rods.

Thus the springs act against the bosses iv on arms 8 andtend to move the arms and blade 1' forwardly about the pivots t, the forward position of the blade being fixed by abutment of the arms 8 against the shoulders formed on rods 20 by reducing the portion thereof passing through the arms and bosses :v.

The plow and frame d with semicircle e is adapted to be lifted about the pivotal connection between the frame and brackets c on 'ing the truck or tractor axle and for this purpose a hoisting device 2 is supported on a frame 3 mounted on the truck or tractor frame and suitably braced therefrom by chains 4. Thehoisting device is conveniently operated through a shaft 5 and is connected to the ends of the semicircle by means of chains 6 and 7 connected through a sheave 8.

'Itwill now be observed that by virtue of my invention, a'snow plow is provided hava main and secondary blade, the main blade being retained in a fixed position on its longitudinal axis and havingits lower edge spaced from the ground. The secondary blade beingpositioned behind the main blade and in operative relation with the 'ground,'to act as a clean-up blade, and so mounted as to have the capacity for swinging backward and upward on a center above and ahead of it, in order to clear obstructions.

Thus it will be observed that by virtue of my invention, a snow plow is provided which under all circumstances, will retain a maximum efiiciency, and especially on meeting with an obstruction, since the main blade is constantly in operative position, thus preventing the passage ofsnow over it and the secondary blade has the capacity for independently adapting itself. to obstructions and, at the same time, since it handles butka small depth of snow under normalcon- V ditions, insuring maximum efficiency in the 'removal of snow.

Having now fully described my invention, what I claim and desire to protect by Letters Patent is :w

V 1. A snow plow comprising a supporting frame, a main blade supported thereby, and a second blade in back ofand extending below the main blade and pivotally supported with relation to the main blade in front of the second blade.

2. A snow plow comprising a main blade, a second blade spaced from and extending below the main blade, means for pivotally supporting the second blade from the main blade in front of the second blade, and means acting to yieldingly retain said second blade in working position.

3. A snow plow comprising a main blade. means to support the main blade in a fixed working position with its lower edge spaced from the ground, a second blade in back of and extending below the main blade, and means for pivotally supporting the second blade from the main blade in front of the second blade.

4. A snow plow comprising a main blade, means to support the main blade in a fixed working position with its lower edge spaced from the ground. a second blade in back of and extending below the main blade, means for pivotally su porting the second blade from the main b ade in front of the second blade, and means acting to yieldingly retain said second blade in working position.

- 5. A snow plow comprising a blade pivotally mounted on a longitudinal axis, adjustable means for retaining said blade in a fixed position, a second blade pivotally connected to said first mentioned blade between the two blades for supporting said second blade in a position spaced from said first blade, and means for yieldingly retaining said second blade in working position.

6. A snow plow comprising a blade pivotally mounted on a longitudinal axis, ad'ustable means for retaining said blade in a 'xed position, a second blade, means pivotally connected to said first mentioned blade for supporting said second blade in a position spaced from said first blade and means supported from said first blade and acting on said last mentioned means for yieldingly retaining said blade in working position.

7. In a snow plow in combination witha frame adapted for attachment to a vehicle, a blade supported from said frame, a second blade pivotally supported from said first blade in a position behind and in overlapping felation with said first blade, tension means supported from said first blade and acting on said second blade to move it forward and means adapted to fix the forward position of said second blade.

8. In a snow plow in combination with a frame adapted for attachment to a vehicle, a blade supported from said frame, a second blade pivotally supported from said first blade in a position behind and in overlapping relation with said first blade, tension means supported from said first blade and acting on said second blade to move it forward and a stop supported from said first blade and adapted to fix the forward position of said second blade.

9. In a snow plow in combination with a frame adapted for attachment to a vehicle, a blade supported from said frame and having its lower edge spaced from the ound, an arm ivotally secured to said first lade, a second lade secured to said arm in a osition behind said first blade and extending elow the lower edge thereof, a rod pivotally attached to said first blade and havin a reduced portion extending through anfi beyond said arm, a spring on said arm, and means engaging said rod and adapted to confine said spring against said arm.

10. In a snow plow in combination with a frame adapted for attachmentto a vehicle, a blade supported from said frame and having its lower edge spaced from the ground, an arm pivotally secured to said first blade. a second blade secured to said arm in a position behind said first blade and extending below the lower edge thereof, a rod ivotally attached to said first blade and fiavin a reduced portion extending through and yond said arm, a spring on said arm, and means engaging said rod and adapted to confine said spring between itself and one side of said rod and stop means adapted to contact with the other side of said arm.

11. In a snow plow in combination with a frame adapted for attachment to a vehicle, a blade supported from said frame and having its lower edge spaced from the ground, an arm pivotally secured to said first blade, a second blade secured to said arm in a position behind said first blade and extending below the lower edge thereof, a spring supported from said first blade and adapted to act on said second blade to move it forward and a stop fixing the forward position of said second blade.

12. In a snow plow in combination a frame adapted to be pivotally attached to a vehicle, a blade pivotally attached to said frame, adjustable means for fixing said blade in a working position with its lower edge spaced from the ground, a. second blade pivotally supported from said first blade, means adapted to normally retain said second blade in a position behind said first blade and in overlap ping relation thereto, said means being adapted to yield to permit said blade to move rearwardly and upwardly on striking an obstruction.

13. In a snow plow in combination, a frame adapted to be attached to a vehicle, a semicircle rotatably mounted on said frame, a blade pivotally attached to said semicircle, means for securing said blade in a fixed position relative to the semi circle and a second blade pivotally supported from said first blade.

14. In a snow plow in combination, a frame adapted to be attached to a vehicle, a semicircle rotatably mounted on said frame, a blade pivotally 'attached to said semicircle on an axis extending longitudinally of said blade, braces connected to said blade and semicircle adapted to fix the position of the blade relative to the semicircle, a second blade pivotally supported from said first blade, a stop adapted to fix the normal position of. said second blade, and tension means adapted to yieldingly retain said blade in normal position.

15. In a snow plow in combination, a frame adapted to be attached to a vehicle, a semicircle rotatably mounted on said frame, a blade pivotally attached to said'semici'rcle on an axis extending longitudinally of said blade, braces connected to said blade and semicircle, a means for affording an adjustable connection between said braces, an arm pivotally connected to said first blade, a second blade sup orted by said arm in a position behind said rst blade tension means supported from said first blade and ielding v acting to move said second blade orwardly,

and a stop adapted to fix the forward of said second blade. 7

16. A snow plow comprising a main blade, means to support the main blade in a fixed Workin position with its lower edge spaced from the ground, a second blade in back of and extending below the main blade, and levers pivoted in front of said second blade for supporting said blade.

17. A snow plow having a supporting frame, a main blade connected to the frame, a second blade in back of and extending below the main blade, supporting levers for the second blade, said levers extending upwardly and forwardly from the second blade, and means for pivotally supporting the upper ends of the levers.

18.- A snow plow having a supporting frame, a main blade connected to said frame position including means for adjusting said blade, a

second blade in back of and extending below the main blade, levers for supporting the second blade extending upwardly and forwardly thereof, and .pivotally connected to' the first blade, and yielding means for the second blade pivotally carried by the main blade. v

19. A snow plow having a supporting frame arranged to be pivotally attached to a vehicle, casters for supporting the forward end of said frame, a main blade ivotally carried by said frame, means for ad usting said main blade, levers pivotally connected to the main blade at their upper ends, said levers extending ibackwardly and downwardly from the main blade, a second blade in back of the main blade connected to the lower ends of said levers, and yielding means connected to the first and second blades for maintaining the second blade in operative position.

20. A snow plow having a main frame adapted to be pivotally attached at its rear to a vehicle, a supplementary frame pivotally attached to the main frame at itsforward ends, a main blade adjustably connected to the supplementary frame, levers connected to the main blade at their upper ends and extended backwardly and downwardly from the pivotal points, a second blade connected to the lower ends of said levers, said blade being in back of t main blade and extending below the lower edge thereof, caster wheels connected to the supplementary frame, and springs interposed between the main blade and the second blade for holding the second blade in operative position.

21. A snow plow having a main frame adapted to be attached to a vehicle t0 swing about a horizontal axis, a supplementary frame pivotally mounted on the forward end of the main frame and arranged to swing about a vertical axis, a main blade adjustably connected to the supplementary frame, casters for supporting the supplementary frame, levers connected at their upper ends to the main blade, said levers extending backwardly and downwardly from their pivotal connec-' tions, a second blade connected to the lower ends of said levers, said second blade being in back of the main blade and extending below the lower edge of the main blade, a plurality of rods pivotally connected to the main blade and extending'througli openings in said levers, and springs mounted on said rodsfor' retaining second blade in working position.

In testimony of which invention, I have hereunto set my hand, at Kennett Square, Penna, on this 13th day of April, 1926.

JAMES M. RISING. 

